tcc -vv/--print-search-dirs: print more info

tests/Makefile:
- print-search-dirs when 'hello' fails
- split off hello-run

win32/include/_mingw.h:
- fix for compatibility with mingw headers
  (While our headers in win32 are from mingw-64 and don't have
  the problem)

tiny_libmaker:
- don't use "dangerous" mktemp

tcc.h

@@ -1067,6 +1067,7 @@ PUB_FUNC int tcc_set_flag(TCCState *s, const char *flag_name, int value);
 PUB_FUNC void tcc_print_stats(TCCState *s, int64_t total_time);
 PUB_FUNC char *tcc_default_target(TCCState *s, const char *default_file);
 PUB_FUNC void tcc_gen_makedeps(TCCState *s, const char *target, const char *filename);
+PUB_FUNC void tcc_display_info(TCCState *s, int what);
 
 /* ------------ tccpp.c ------------ */